锂质无光釉表面显微结构研究

分析了锂质无光釉表面显微结构与釉面光学特征的关系。认为良好的无光釉对表面的晶体形态、晶体大小和含量以及玻璃含量均有较严格的要求。在确定釉的配方后,关键是烧成工艺,控制好烧成温度和降温速率极为重要。成核剂的加入对形成理想的锂质无光釉表面显微结构反而不利。     

用质子激发X荧光技术鉴别清代仿明成化青花瓷

用质子激发Ｘ荧光技术对瓷胎,瓷釉的化学成分进行了测量,选用瓷釉和瓷胎相结合的判别方法,可以将清化的仿品与明代的真品区分开来。     

Effects of spraying parameters onto flame-sprayed glaze coating structures

Thanks to their design characteristics (i.e., colors, brightness, opacity, etc.) and/or physical properties (i.e., durability, low thermal conductivity, tightness, etc.), glazes find numerous applications, from art ornamenting to protection against corrosion. Glazing consists in coating a substrate by fusing various mineral substances over it. This is a low cost process and hence can be applied on large surfaces. Conventional glazing process needs a relatively high temperature treatment (i.e., up to 1400 °C) that heat-sensitive substrates do not sustain.Thermal spraying may be a good solution to prevent the substrate from thermal degradation. Flame spraying was considered as the spray technique due to its low operating cost and the possibility to adapt the glaze transition temperature to the operating parameters.When spraying glazes, the coating formation mechanism is different from the one encountered with crystallized ceramic materials. Indeed, the high surface tension of those feedstock prevents the particles from being totally spread (i.e., “dewetting” phenomena). Here, the coating results from the coalescence of impinging particles to form a monolayer.The effects of glaze morphology on coatings were studied in this paper. Chemical analysis also permitted to determine the influence of spray parameters on glaze compositions, that can affect glazes thermal properties and hence modify coating structures. At last, the effects of operating parameters on coating architecture were analyzed by experimental design.     

澳洲锂辉石在不同陶瓷釉料中的应用

澳洲锂辉石在陶瓷釉料中的应用已越来越广泛，本文介绍了锂辉石在几种主要陶瓷釉料中的具体应用。     

鲜黄色陶瓷渗花釉的研制

本文就黄色渗花釉进行了研究,以高的锑含量及其鲜黄发色来抵消铬盐的暗色调, 取得了较为特殊的黄色渗花效果。     

Application of focused ion beam-field emission scanning electron microscopy-X-ray microanalysis in the study of the surface alterations of archaeological tin-glazed ceramics

The historical evolution of tin-glazed ceramics is a subject that has attracted the attention of many scientists and, consequently, abundant archaeometrical studies can be found in the specialized literature. Nevertheless, a lesser number of studies aimed at the characterization of the alterations undergone by archaeological glazes has been reported. This work describes some unusual alteration processes found in tin-glazes depending on the environmental conditions surrounding the piece during centuries. For this purpose, focused ion beam-field emission scanning electron microscopy-X-ray microanalysis (FIB-FESEM-EDX), an advanced instrumental technique for surface analysis at the nanoscale, has been used for the first time, complementarily to optical microscopy (OM), FESEM-EDX and Fourier transform Infrared spectroscopy (FTIR). In the buried glaze the nanostructure of the outer lamellar corrosion layer due to humidity-dryness cycles is described. Unusual and selective erosion of the glaze matrix due to the silicification metabolism of diatoms is observed in a submarine glaze. A nanometric outer corrosion layer formed by precipitated corrosion products and unspecific organic matter that has been partially degraded to lead and calcium oxalates is found in a glazed tile subjected to an atmospheric environment.     

Evaluation of solid wastes in the manufacture of ceramic tableware glazes

The recovery and reuse of industrial wastes are of great importance to the environment. Today, a large amount of waste is produced due to marble production, and it is extremely important to bring such wastes to the ceramic industry, to solve the pollution problem and to provide cost-efficient ceramic production. In this study, marble waste was used for ceramic earthenware glaze and body formulations. Marble waste was used in two different formulations as glaze and body. Chemical analysis, morphological features, crystallographic information of different formulations were made with XRF, SEM and XRD, respectively. When the hardness test results of the ceramic body and glazed samples were examined, the hardness values of the marble waste added samples increased by 1.9% compared to the standard samples. According to the results obtained, it has been seen that using marble waste in the ceramic industry is very important for both economic and environmental reasons.     

Microstructure and mechanical properties of diopside and anorthite glazes with high abrasion resistance

The paper presents the results of research on the influence of the chemical composition of frits on the microstructure and mechanical properties of ceramic glazes. Glaze sets are designed based on frits of different chemical composition and increasing B₂O₃ content. Thermal DSC analysis showed a high tendency to crystallize the designed glazes, and in the obtained glazes the main crystalline phases were diopside or anorthite, which was also confirmed by XRD analysis and SEM microscopic observations. In glazes not containing B₂O₃ and at a SiO₂/Al₂O₃ molar ratio in the 5.3–5.6 range, mainly diopside crystallized, while a decrease in the SiO₂/Al₂O₃ molar ratio to a value below 4.9 and an increase in B₂O₃ content contributed to an increase in the anorthite crystal phase content. The obtained glazes were characterized by a surface roughness of Ra in the range of 0.2–1.1 μm and a high abrasion resistance measured with a mass loss of less than 50 mg after 6000 abrasion cycles in accordance with the EN ISO 10545-7 standard. Such high abrasion resistance was achieved thanks to the high hardness of the glazes in the range of 6.4–8.0 GPa, which was confirmed by the Vickers hardness measurement.     

陶瓷砖装饰用釉料——微晶玻璃釉

近年来，微晶玻璃材料引起众多行业的关注，主要原因在于其具有一些特殊的性能，如良好的耐腐蚀性能、机械强度高、表面硬度高、热膨胀系数低以及适应性强等特性。微晶玻璃铀应用陶瓷行业的变化是，传统的二次烧成工艺逐渐被—次快速烧成替代和传统的铀料配方有了很大的改变。     

Effect of zirconia addition amount in glaze on mechanical properties of porcelain slabs

Applying toughened glaze layer on porcelain slabs can improve the fracture toughness of slabs and greatly reduce the production cost. In this study, porcelain slabs glaze with high toughness was fabricated by the processes of impregnation glazing and single firing method, using opaque frits, kaolin clay as the main raw materials, zirconia as an additive, and the effect of the addition amount of zirconia in glaze on fracture toughness of porcelain slabs was investigated. The results showed that the type and content of crystal phase of the glaze were greatly influenced by the addition amount of zirconia. Meanwhile, compared with the base glaze, the hardness and fracture toughness of the sample with zirconia glaze were significantly improved. Porcelain slabs with 10 wt% zirconia in glaze, sintering at 1200 °C, exhibited higher quality glaze and outstanding properties, including a water absorption of 1.95%, a Vickers hardness of 6.36 GPa, and a fracture toughness of 2.71 MPa m^1/2. The toughening mechanism of the glaze layer was as follows: a large number of zirconium silicate grains with high hardness were generated by the reaction of added zirconia with silica in the glass phase, which increased the content of crystal phase and then prevented the propagation of cracks; moreover during the martensitic transformation of the tetragonal zirconia grains, the volume and shear strain were generated to offset the stress field generated by the crack tip, thus toughening the material.